When I give my testimony, I do mention my life before I was converted. When we look at Paul's testimony, he talks in some detail about his life before the Lord Jesus Christ spoke to him and the road to Damascus. For example:
(Php 3:4-10 NKJV) though I also might have confidence in the flesh. If anyone else thinks he may have confidence in the flesh, I more so: circumcised the eighth day, of the stock of Israel, of the tribe of Benjamin, a Hebrew of the Hebrews; concerning the law, a Pharisee; concerning zeal, persecuting the church; concerning the righteousness which is in the law, blameless. But what things were gain to me, these I have counted loss for Christ. Yet indeed I also count all things loss for the excellence of the knowledge of Christ Jesus my Lord, for whom I have suffered the loss of all things, and count them as rubbish, that I may gain Christ and be found in Him, not having my own righteousness, which is from the law, but that which is through faith in Christ, the righteousness which is from God by faith; that I may know Him and the power of His resurrection, and the fellowship of His sufferings, being conformed to His death,
Of course, we are not to indulge in self-pity, nor wallow in our past sin and shame. But saying what we have been saved from is a vital part of our testimony.
